EP0867621A1 - Method of manufacturing hollow blade, and hollow blade manufactured by same - Google Patents
Method of manufacturing hollow blade, and hollow blade manufactured by same Download PDFInfo
- Publication number
- EP0867621A1 EP0867621A1 EP97944105A EP97944105A EP0867621A1 EP 0867621 A1 EP0867621 A1 EP 0867621A1 EP 97944105 A EP97944105 A EP 97944105A EP 97944105 A EP97944105 A EP 97944105A EP 0867621 A1 EP0867621 A1 EP 0867621A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- blade bodies
- hollow
- convex parts
- bodies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/137—Beaded-edge joints or bead seals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/748—Machines or parts thereof not otherwise provided for
- B29L2031/7496—Pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/20—Manufacture essentially without removing material
- F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
- F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/19—Sheets or webs edge spliced or joined
- Y10T428/192—Sheets or webs coplanar
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24777—Edge feature
Definitions
- This invention relates to a method of manufacturing a hollow blade and a hollow blade manufactured by the method.
- Fig. 7 shows one of procedures in a conventionally typical method of manufacturing a hollow blade.
- Figs. 8 and 9 each show an essential part of a hollow blade 50 manufactured by the conventional method.
- a first blade body 51 with a recessed part 53 and a second blade body 52 formed so as to close the recessed part 53 are first put together. Then, the first and second blade bodies 51, 52 are joined by welding by means of a ultrasonic welding device thereby forming the hollow blade 50 internally provided with a hollow part 56 composed of a part of the recessed part 53.
- the first blade body 51 is provided with a shelf surface 54 formed at an outer periphery of the recessed part 53.
- An outer peripheral part of the back face 52b of the second blade body 52 is laid on the shelf surface 54 of the first blade body 51 so that the second blade body 52 is faced with the first blade body 51 in a partly contact state.
- An outer peripheral end surface 51b between the shelf surface 54 and the surface 51a of the first blade body 51 is opposed to an outer peripheral end surface 52c of the second blade body 52 with a set space left, thereby creating a clearance 59 between both the outer peripheral end surfaces 51b, 52c.
- a horn 60 of the ultrasonic welding device is moved down from above the clearance 59.
- the end surface 60a of the horn 60 is located at a position of crossing the first and second blade bodies 51, 52 interposing the clearance 59 therebetween and comes into contact with both the blade bodies 51, 52 while pressing them.
- ultrasonic vibrations are applied to the blade bodies 51, 52 by the horn 60 in its pressing direction (direction of arrows a-b of Fig. 7).
- Frictional heat resulting from the ultrasonic vibrations is produced between the shelf surface 54 of the first blade body 51 and the outer peripheral part of the back face 52b of the second blade body 52 which come into face-to-face contact with each other, and is also produced between each of the surfaces 51a, 52a of the first and second blade bodies 51, 52 and the end surface 60a of the horn 60 which come into face-to-face contact with each other.
- the former has a higher temperature. Accordingly, resin is more readily melted at a part where the back face 52b of the second blade body 52 is laid on the shelf surface 54 of the first blade body 51, so that a resin melting part 55 shown in Fig. 8 or a first resin melting part 55A shown in Fig. 9 is produced.
- the first and second blade bodies 51, 52 are joined to each other through the resin melting part 55 or the first resin melting part 55A.
- the depth of the impression 58 becomes larger as shown in Fig. 9, so that the amount of melting resin produced accompanying the formation of the impression 58 is increased.
- a part of the melting resin flows into the clearance 59 so that a second resin melting part 55B is formed at an upper portion of the clearance 59.
- the second resin melting part 55B joins the first and second blade bodies 51, 52 to each other.
- the joint strength between the first and second blade bodies 51, 52 is mainly ensured by the resin melting part 55 (in the case of Fig. 8) or the first resin melting part 55A (in the case of Fig. 9). However, when both the blade bodies 51, 52 are also joined to each other through the second resin melting part 55B as shown in Fig. 9, the joint strength between both the blade bodies 51, 52 is increased, which is preferable in point of joint strength.
- the resin melting part 55 in the case of Fig. 8 or the first resin melting part 55A (in the case of Fig. 9) as mentioned above, the resin melting parts 55, 55A must be surely formed in order to ensure reliability on the manufacture of the hollow blade 50. In other words, it is necessary to check, in a quality inspection after the manufacture, that the parts in question have been subjected to welding by the ultrasonic welding device.
- a particular need for mass production of the hollow blade 50 is that the quality inspection can be made with efficiency and reliability.
- the impression 58 can be an object of the visual check.
- the depth of the impression 58 produced on the surfaces 51a, 52a of the first and second blade bodies 51, 52 is reduced as small as possible. Accordingly, when the quality inspection is performed through a visual check of the impression 58, it is difficult to recognize the impression 58 and, in some cases, it may be difficult to judge whether a welding work has been made or not. Accordingly, the above-mentioned hollow blade 50 has a problem in point of efficiency and reliability of the quality inspection.
- the hollow blade 50 shown in Fig. 9 since the depth of the impression 58 is large, a visual check of the impression 58 can be made with ease and reliability, which makes the hollow blade 50 of this case seem preferable in point of efficiency and reliability of the quality inspection. Further, since the second resin melting part 55B is formed at the upper portion of the clearance 59, the hollow blade 50 of this case has an advantage in its increased joint strength.
- the present invention has been made in view of the foregoing problems and therefore, has its object of providing a hollow blade on which an inspection for a joint work can be performed with efficiency and reliability through a visual check from outside while the smoothness of the blade surface is maintained and providing a method of manufacturing the hollow blade.
- the present invention takes the following measures.
- a first invention premises a method of manufacturing a hollow blade whereby first and second resin-made blade bodies formed by injection molding are put together and are joined by welding by means of an ultrasonic welding device to form a hollow blade internally provided with a hollow part.
- respective convex parts swelling from respective surfaces of the first and second blade bodies are formed at positions contiguous with and opposed to each other when both the blade bodies are put together.
- a horn of the ultrasonic welding device is placed at a position of crossing both the convex parts to come into contact with the top surfaces of the convex parts while pressing them at the same time and in this state the ultrasonic welding device is operated.
- both the convex parts are deformed by melting under pressure through the horn to trickle melting resin of both the convex parts into a clearance between the first and second blade bodies so that both the blade bodies are welded in a manner of forming a bridge therebetween, thereby joining both the blade bodies into one piece to form a hollow blade.
- a second invention is so composed that in the first invention, an amount of deformation of each of the convex parts through the application of pressure by the horn is set at a value approximately identical to the height of the convex part.
- a third invention premises a hollow blade in which first and second blade bodies are put together to form a hollow part therebetween.
- the first and second blade bodies in a state of being put together are joined by welding at their contact parts and their opposed parts forming a clearance created when the first and second blade bodies are put together.
- a fourth invention is so composed that in the third invention, a welded part at the clearance between the first and second blade bodies is formed such that the surface thereof is approximately flush with the surfaces of the first and second blade bodies.
- respective convex parts are provided on respective surfaces of the first and second blade bodies in injection-molding both the blade bodies, the first and second blade bodies are welded at their contact parts, and melting resin of both the convex parts are concurrently trickled into a clearance between the first and second blade bodies so that both the blade bodies are welded. Accordingly, a joint work can be verified by a visual check of the deformation of the convex parts.
- a resin melting part is surely formed on the contact surfaces of the first and second blade bodies inside the hollow blade, and the joint of both the blade bodies through the resin melting part can be verified with ease and reliability.
- a post-manufacturing quality inspection of the hollow blade can secure efficiency and reliability.
- the convex parts are melted and the melting resin thereof is trickled into the clearance between the first and second blade bodies by the horn, so that a resin melting part is formed in the shape of a bridge between both the blade bodies.
- the first and second blade bodies are also joined at an upper portion of the clearance through the resin melting part, which further increases joint strength.
- the blade surface since an amount of deformation of each of the convex parts through the application of pressure by the horn is set at a value approximately identical to the height of the convex part, the blade surface has no unevenness when the convex parts are deformed under pressure, which maintains the excellent smoothness of the blade surface.
- the joint strength between both the blade bodies is higher as compared with the case that both the blade bodies are joined by welding only at their contact parts, which increases the reliability in using the blade.
- a welded part at the clearance between the first and second blade bodies is formed such that the surface thereof is approximately flush with the surfaces of the first and second blade bodies, noise when an impeller formed of the first and second blade bodies is run can be reduced to a minimum in contrast to the conventional case that an impression is left on the blade surface, thereby realizing a quiet run of the impeller.
- Fig. 1 shows a hollow blade 1 manufactured by a manufacturing method of the present invention.
- Fig. 2 shows a sectional form of the hollow blade 1.
- a plurality of such hollow blades 1 are fixed to a boss 7 thereby forming an impeller.
- the hollow blade 1 is formed into a plane having an approximate trapeziform outline and is internally provided with a hollow part 5 extending along the plane.
- the hollow blade 1 is manufactured by putting together first and second blade bodies 2, 3 and joining them.
- the first blade body 2 is previously formed into a set shape by injection molding with the use of a resin material prior to a joint work below-mentioned.
- the shape is as follows: as shown in Figs. 1 and 2, the first blade body 2 is formed into a plane having an approximate trapeziform outline; the surface 2a of the first blade body 2 forms the back face 1f of the hollow blade 1; and the back face 2b of the first blade body 2 is provided with an approximate trapeziform recessed part 4 which is recessed on the surface 1a side along the outline of the first blade body 2.
- a peripheral edge of the recessed part 4 is provided with a shelf surface 22 which is located slightly above the bottom of the recessed part 4 and extends along the plane of the first blade body 2, and is provided with an outer peripheral end surface 21 rising along the outer peripheral edge of the shelf surface 22.
- the first blade body 2 has an integrally-molded blade fixing part 11 which serves as a part for fixing the first blade body 2 to the boss 7.
- the second blade body 3 is previously formed into a set shape by injection molding with the use of a resin material prior to the joint work.
- the shape is as follows: as shown in Figs. 1 and 2, the second blade body 3 is fitted on the recessed part 4 of the first blade body 2 so as to cover it and is joined to the peripheral edge of the recessed part 4; the second blade body 3 is formed into a plane having an approximate trapeziform outline so as to conform to the outline of the recessed part 4; and the surface 3a of the second blade body 3 forms a part of the surface 1e of the hollow blade 1.
- first and second blade bodies 2, 3 are provided with convex parts 23, 32 characterized in the present invention, respectively.
- the convex part 23 has an approximate half columnar shape and is formed on the back face 2b of the first blade body 2 which forms a part of the surface 1e of the hollow blade 1.
- a plurality of the convex parts 23 are provided along the peripheral edge of the recessed part 4.
- the convex parts 23 are integrally formed with the first blade body 2 in such a manner as to swell parts of the first blade body 2 to a set height when the first blade body 2 is injection-molded.
- seven convex parts 23 are provided as shown in Fig. 1.
- the convex part 32 has an approximate half columnar shape, similarly to the convex part 23, and is formed on the surface 3a of the second blade body 3 which forms a part of the surface 1e of the hollow blade 1.
- a plurality of the convex parts 32 are provided along the peripheral edge of the recessed part 4.
- the positions where the convex parts 32, 32, ... of the second blade body 3 are to be formed are set to correspond to the positions of the convex parts 23, 23, ... of the first blade body 2, respectively.
- the convex parts 32 are integrally formed with the second blade body 3 in such a manner as to swell parts of the second blade body 3 to a set height when the second blade body 3 is injection-molded.
- the convex parts 23, 23, ... of the first blade body 2 are contiguous with and opposed to the convex parts 32, 32, ... of the second blade body 3, respectively, when the first and second blade bodies 2, 3 are put together.
- the first and second blade bodies 2, 3 which are put together are subjected to a joint work by means of an ultrasonic welding device thereby forming both the blade bodies 2, 3 into one piece.
- This formation of a one-piece structure provides a hollow blade 1 internally provided with the hollow part 5 formed of the recessed part 4.
- a horn 16 attached to an oscillator 15 of the ultrasonic welding device is placed above a pair of the convex parts 23, 32.
- the end of the horn 16 is made contact with the top surfaces of the convex parts 23, 32 and a specified pressing force is applied to the convex parts 23, 32.
- ultra sonic vibrations in a direction of applying the pressing force are given to the convex parts 23, 32 through the horn 16.
- first resin melting part 41 As shown in Fig. 3.
- first resin melting part 41 Through the first resin melting part 41, the first and second blade bodies 2, 3 are joined in the vicinity of a lower end of the clearance 10.
- a bridge-like second resin melting part 42 is formed at the upper part of the clearance 10 so as to cross the outer peripheral end surface 21 of the first blade body 2 and the outer peripheral end surface 31 of the second blade body 3. Through the second resin melting part 42, the first and second blade bodies 2, 3 are joined at the upper part of the clearance 10.
- first and second blade bodies 2, 3 are joined to each other in the vicinity of the lower end of the clearance 10 as well as at the upper part of the clearance 10, joint strength can be increased as compared with the case that both the blade bodies 2, 3 are joined only in the vicinity of the lower end of the clearance 10. Further, when an impeller is produced with the use of such a hollow blade 1 formed of both the blade bodies 2 and 3, operational reliability can be ensured.
- an amount of deformation of each of the convex parts 23, 32 through the application of pressure by the horn 16 is set at a value approximately identical to the height of the convex part 23, 32. Accordingly, as shown in Fig. 3, when the joint work is completed, no impression of the convex parts 23, 32 is left on the surface 1e of the hollow blade 1 and an approximate flush surface is formed from the back face 2b of the first blade body 2 to the surface 3a of the second blade body 3, thereby ensuring excellent smoothness.
- the hollow blade 1 manufactured according to the present embodiment is subjected to a post-manufacturing quality inspection in which the joint state of the first and second blade bodies 2, 3 is verified.
- the convex parts 23, 32 having been formed on the first and second blade bodies 2, 3 prior to the joint work are eliminated by deformation under pressure during the joint work. Accordingly, in the quality inspection, an inspector can check the state of the first resin melting part 41 inside the hollow blade 1 with ease and reliability through a visual check for the convex parts 23, 32 from outside.
- the joint state can be verified with ease and reliability thereby ensuring efficiency and reliability of the quality inspection.
- a hollow blade of the invention As described so far, according to a method of manufacturing a hollow blade of the invention and a hollow blade manufactured by the method, the joint state can be readily verified and high joint strength can be obtained.
- a hollow blade is suitable for use in a low-noise impeller.
Abstract
Description
Claims (4)
- A method of manufacturing a hollow blade whereby first and second resin-made blade bodies (2, 3) formed by injection molding are put together and are joined by welding by means of an ultrasonic welding device to form a hollow blade (1) internally provided with a hollow part (5), comprising the steps of:in injection-molding the first and second blade bodies (2, 3), forming respective convex parts(23, 32) swelling from respective surfaces (2b, 3a) of the first and second blade bodies (2, 3) at positions contiguous with and opposed to each other when both the blade bodies (2, 3) are put together;placing a horn (16) of the ultrasonic welding device at a position that the horn (16) crosses both the convex parts (23, 32) to come into contact with the top surfaces of the convex parts (23, 32) while pressing them at the same time and then, in this state, operating the ultrasonic welding device; andwelding contact surfaces of the first and second blade bodies (2, 3) which extend in a direction approximately orthogonal to a direction of putting together both the blade bodies (2, 3) at their portions corresponding to a pressing direction of the horn (16), and concurrently deforming both the convex parts (23, 32) by melting under pressure through the horn (16) to trickle melting resin of both the convex parts (23, 32) into a clearance (10) between the first and second blade bodies (2, 3) so that both the blade bodies (2, 3) are welded in a manner of forming a bridge therebetween, thereby joining both the blade bodies (2, 3) into one piece to form a hollow blade (1).
- A method of manufacturing a hollow blade according to Claim 1, wherein
an amount of deformation of each of the convex parts (23, 32) through the application of pressure by the horn (16) is set at a value approximately identical to the height of the convex part (23, 32). - A hollow blade in which first and second blade bodies (2, 3) are put together to form a hollow part (5) therebetween, wherein
the first and second blade bodies (2, 3) in a state of being put together are joined by welding at their contact parts and their opposed parts forming a clearance created when the first and second blade bodies (2, 3) are put together. - A hollow blade according to Claim 3, wherein
a welded part at the clearance between the first and second blade bodies (2, 3) is formed such that the surface thereof is approximately flush with the surfaces (2b, 3a) of the first and second blade bodies (2, 3).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP270901/96 | 1996-10-14 | ||
JP8270901A JP2982710B2 (en) | 1996-10-14 | 1996-10-14 | Method for manufacturing hollow wing and hollow wing manufactured by the method |
PCT/JP1997/003661 WO1998016746A1 (en) | 1996-10-14 | 1997-10-09 | Method of manufacturing hollow blade, and hollow blade manufactured by same |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0867621A1 true EP0867621A1 (en) | 1998-09-30 |
EP0867621A4 EP0867621A4 (en) | 2004-11-10 |
EP0867621B1 EP0867621B1 (en) | 2006-07-05 |
Family
ID=17492568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97944105A Expired - Lifetime EP0867621B1 (en) | 1996-10-14 | 1997-10-09 | Method of manufacturing hollow blade |
Country Status (6)
Country | Link |
---|---|
US (1) | US6132826A (en) |
EP (1) | EP0867621B1 (en) |
JP (1) | JP2982710B2 (en) |
CN (1) | CN1093230C (en) |
DE (1) | DE69736274T8 (en) |
WO (1) | WO1998016746A1 (en) |
Cited By (2)
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FR2848620A1 (en) * | 2002-12-13 | 2004-06-18 | Valeo Systemes Dessuyage | Fan for cooling motor of automobile car, has several blades distributed regularly around bowl which is moved in axial rotation where each blade is partially hollow at part situated directly near leading edge |
EP1596036A1 (en) * | 2004-05-14 | 2005-11-16 | General Electric Company | Friction stir welded hollow airfoils and method therefor |
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Publication number | Priority date | Publication date | Assignee | Title |
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US6939108B2 (en) * | 2003-01-06 | 2005-09-06 | Mechanization Systems Company, Inc. | Cooling fan with reinforced blade |
JP4432474B2 (en) * | 2003-11-27 | 2010-03-17 | ダイキン工業株式会社 | Centrifugal blower impeller and centrifugal blower provided with the impeller |
DK2666615T3 (en) * | 2012-05-23 | 2015-06-15 | Nordex Energy Gmbh | Process for producing a rotor blade half shell for a wind power plant or for producing a rotor blade for a wind power plant, and production form for this purpose |
US20140286785A1 (en) * | 2013-03-08 | 2014-09-25 | General Electric Company | Method of producing a hollow airfoil |
KR101645178B1 (en) * | 2013-05-10 | 2016-08-03 | 엘지전자 주식회사 | Centrifugal fan and manufacturing method thereof |
JP6107771B2 (en) * | 2014-08-28 | 2017-04-05 | ダイキン工業株式会社 | Feather parts |
GB201506901D0 (en) * | 2015-04-23 | 2015-06-10 | Rolls Royce Plc | Manufacture of a hollow aerofoil |
JP6672233B2 (en) * | 2017-09-25 | 2020-03-25 | 三菱重工業株式会社 | Method for forming composite material wing, composite material wing, and molding die for composite material wing |
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DE1628277B1 (en) * | 1966-06-16 | 1971-03-25 | Helios Appbau Kg Mueller & Co | METHOD OF MANUFACTURING WING PARTS OF A COLLAR WING |
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US4720244A (en) * | 1987-05-21 | 1988-01-19 | Hudson Products Corporation | Fan blade for an axial flow fan and method of forming same |
CN2057246U (en) * | 1989-11-28 | 1990-05-16 | 湘潭南方空调环保技术开发公司 | All-arc hollow chamfered backward wing blade for centrifugal fan |
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JPH0741338B2 (en) * | 1992-04-30 | 1995-05-10 | 株式会社アサヒエムアンドイー | Method of forming blade for mixed flow fan |
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DE19542080C1 (en) * | 1995-11-11 | 1997-01-30 | Mtu Muenchen Gmbh | Blade for turbo engines for the production of impellers with integral hollow blades |
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1996
- 1996-10-14 JP JP8270901A patent/JP2982710B2/en not_active Expired - Fee Related
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1997
- 1997-10-09 US US09/029,612 patent/US6132826A/en not_active Expired - Fee Related
- 1997-10-09 EP EP97944105A patent/EP0867621B1/en not_active Expired - Lifetime
- 1997-10-09 DE DE69736274T patent/DE69736274T8/en active Active
- 1997-10-09 WO PCT/JP1997/003661 patent/WO1998016746A1/en active IP Right Grant
- 1997-10-09 CN CN97191096A patent/CN1093230C/en not_active Expired - Fee Related
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DE1628278A1 (en) * | 1966-06-16 | 1971-03-18 | Helios Appbau Kg Mueller & Co | Process for the production of fan blades |
DE1628277B1 (en) * | 1966-06-16 | 1971-03-25 | Helios Appbau Kg Mueller & Co | METHOD OF MANUFACTURING WING PARTS OF A COLLAR WING |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2848620A1 (en) * | 2002-12-13 | 2004-06-18 | Valeo Systemes Dessuyage | Fan for cooling motor of automobile car, has several blades distributed regularly around bowl which is moved in axial rotation where each blade is partially hollow at part situated directly near leading edge |
EP1596036A1 (en) * | 2004-05-14 | 2005-11-16 | General Electric Company | Friction stir welded hollow airfoils and method therefor |
US7189064B2 (en) | 2004-05-14 | 2007-03-13 | General Electric Company | Friction stir welded hollow airfoils and method therefor |
Also Published As
Publication number | Publication date |
---|---|
EP0867621A4 (en) | 2004-11-10 |
EP0867621B1 (en) | 2006-07-05 |
DE69736274D1 (en) | 2006-08-17 |
JP2982710B2 (en) | 1999-11-29 |
CN1198804A (en) | 1998-11-11 |
US6132826A (en) | 2000-10-17 |
DE69736274T2 (en) | 2007-09-13 |
JPH10122195A (en) | 1998-05-12 |
CN1093230C (en) | 2002-10-23 |
WO1998016746A1 (en) | 1998-04-23 |
DE69736274T8 (en) | 2007-12-27 |
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